Vittorio's brother Luca Missoni told WWD that investigators haven't ruled out any of the theories about Vittorio's disappearance. "For this reason, I can confirm that in Caracas not only is the search at sea and on the coast not over, but that investigations continue, without neglecting any possibility," he said.
Luca had been in Venezuela helping with the search effort over the last few weeks, but he said that a family friend is now following the search party in his place. Luca will travel from Italy back to Venezuela in February, when a ship used for "deep sea submarine research" will join the effort.
Vittorio Missoni was flying from the Venezuelan resort archipelago of Los Roques to Caracas with his wife, Maurizia Castiglioni, their friends Guido Foresti and Elda Scalvenzi, and two crew members on Jan. 4 when their plane disappeared. So far no sign of the plane or its passengers has been found.
Related: Was Vittorio Missoni Kidnapped?